Turbulent transport of particles, temperature and magnetic fields
have been investigated systematically for more than a hundred years
in theoretical, experimental and numerical
studies [1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]}.
But some fundamental questions remain.
This is particularly true in applications to astrophysics,
where the governing parameter values are too
large to be modelled either experimentally or numerically.
